A decade and a half ago Nicholas Tavuchis noted that a genuine apology on behalf of a political body 'is an accomplishment of no mean order.' Girma Negash's Apologia Politica is a like accomplishment. He knows the differences between failed and successful apologies by high officials concerning the low deeds of state-sponsored atrocity. The book is a triumph of interdisciplinary research and writing. It combines historical accuracy, political realism, and moral insight concerning one of the greatest of all political challenges: how to mend and heal relations between victims and perpetrators of vast evil? Negash describes credible apology as a combination of acknowledgment of a collective wrong, identification of those responsible, public truth-telling about the wrong, and citizen-supported remorse. It is a rigorous formula. If citizens and political leaders of our vexed global community learn to practice that rigor, the twenty-first century might yet recover from the collective sins of the twentieth. Here is wise guidance into the realization of that hope.